14.2.2. Neighbor discovery

Following packets are sent by a node with layer 2 MAC address “0:12:34:12:34:56” during autoconfiguration to check whether a potential address is already used by another node on the link sending this to the solicited-node link-local multicast address.

Node wants to configure its link-local address “fe80::212:34ff:fe12:3456”, checks for duplicate now